package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;

/**
 * @BelongsProject: sky-take-out
 * @BelongsPackage: com.sky.service.impl
 * @Author: song
 * @CreateTime: 2024-01-09  16:20
 * @Description: C端用户具体实现
 * @Version: 1.0
 */
@Service
public class UserServiceImpl implements UserService {
    public static final String WX_LOGIN = "https://api.weixin.qq" +
            ".com/sns/jscode2session";
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;
    /**
     * @description:C端用户登录具体实现
     * @author: song
     * @date: 2024/1/9 16:21
     * @param: [userLoginDTO]
     * @return: com.sky.entity.User
     **/
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        String openid = getOpenid(userLoginDTO.getCode());
        // 判断openid是否为空，为空的话抛出业务异常
        if (openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        // 判断当前用户是否为新用户
        User user = userMapper.getByOpenId(openid);
        if (user == null){
            user =User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        return user;
    }

    private String getOpenid(String code){
        // 调取微信服务接口，获取当前用户的openid
        HashMap<String, String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);

        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");

        return openid;
    }
}
